It can be improved..Undergo glutathione medicine therapy therapy.. otherwise few creams also available...for detailed prescription do direct online consultation by sending photos.

Reason for dark private areas and ingrown hair can be friction, waxing or use of hair removal creams . Before giving any solution need to examine it . Permanent solution for ingrown hair is laser hair removal… kindly book an appointment with me for proper reassessment and treatment.

U could be having Acanthosis nigricans. It is a skin condition that causes a dark discoloration in body folds and creases. It typically affects the armpits, groin and neck. Acanthosis nigricans is a skin condition characterized by areas of dark, velvety discoloration in body folds and creases. The affected skin can become thickened. Consult a Dermatologist with a proper history for better understanding

It would be better if you can provide a good photographs and relevant history.